HSC Science (Electronics) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions

Show that for a first order reaction half life is independent of initial concentration.

Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion (A): Alkyl halides are insoluble in water.

Reason (R): Alkyl halides have halogen attached to sp³ hybrid carbon.

Select the most appropriate answer from the options given below:

Isopropylbenzene on air oxidation followed by decomposition by dilute acid gives ______.

The value of [H₃O⁺] in mol lit^–1 of 0.001 M acetic acid solution (K_a = 1.8 × 10^–5) is ______.

Explain the trends in the following atomic properties of group 16 elements:

Atomic radii

Explain the trends in the following atomic properties of group 16 elements:

Ionisation enthalpy

Explain the trends in the following atomic properties of group 16 elements:

Electronegativity

Explain the trends in the following atomic properties of group 16 elements:

Electron gain enthalpy

Write preparation of phenol from aniline.

Write chemical reactions to prepare ethanamine from:

Acetonitrile

Write chemical reactions to prepare ethanamine from:

Nitroethane

Write chemical reactions of following reagents on methoxyethane:

PCl₅

Polonium has the half-Life of ______.

Name one amphoteric solvent.

The monomer of natural rubber is ______.

Write the name of the product formed by the action of LiAlH₄/ether on acetamide.

Calculate molar conductivity for 0.5 M BaCl₂ if its conductivity at 298K is 0.01 Ω^–1 cm^–1.

Convert the following:

Ethyl alcohol into ethyl acetate.

How will you obtain the following? (Give balanced equation.)

Ethyl chloride from diethyl ether.

Write a chemical reaction for the following conversion:

Acetic acid into ethyl alcohol.